How to merge 3-hourly NetCDF files into 6-hourly NetCDF files?
Added by Alwin Bathan 3 months ago
I have downloaded MSWEP's 3-hourly rainfall data but I need to convert them into 6 hourly-data.
I understand that I can use
cdo mergetime
but the current .nc files are labeled:
2024001.00.nc
2024001.03.nc
2024001.06.nc
2024001.09.nc
2024001.12.nc
2024001.15.nc
2024001.18.nc
2024001.21.nc
If I understand correctly, doing
cdo mergetime 202400*.nc
would give me daily rainfall data.
On the other hand, doing
cdo mergetime 2024001.*.nc
would give me 12-hourly rainfall data.
Any ideas how I can get 6-hourly data? Is there also a way where I can repeat the solution for each day of my data (1979-2024)
Replies (2)
RE: How to merge 3-hourly NetCDF files into 6-hourly NetCDF files? - Added by Alwin Bathan 3 months ago
My mistake, doing
cdo mergetime 202400*.nc
merges day 1-9 data, while
cdo mergetime 2024001.*.nc
gives me daily rainfall data
RE: How to merge 3-hourly NetCDF files into 6-hourly NetCDF files? - Added by Karin Meier-Fleischer 3 months ago
If you want to convert data from 3-hourly to 6-hourly time intervall you can use the inttime operator. You can use the operator chaining to do this and the time merge in one step.
For example
cdo -O -inttime,2024-01-01,12:00:00,6hour -mergetime 2024*.nc outfile.nc